JPH02222702A - Solvent for removing sticking water - Google Patents

Abstract

PURPOSE:To obtain a solvent for removing sticking water hardly corroding metals, plastics, elastomers, etc., by incorporating 3C unsatd. chlorofluorohydrocarbon as an effective component. CONSTITUTION:A solvent for removing sticking water is obtd. by incorporating one or more kinds of 3C unsatd. chlorofluorohydrocarbons. The solvent hardly corrodes metals, plastics, elastomers, etc., like R113. The sticking water removing effect of the solvent is enhanced by incorporating at least one kind of compd. selected among hydrocarbons, alcohols, ketones, halogenated hydrocarbons and surfactants into the solvent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a solvent for removing water adhered to lenses, liquid crystal display device parts, electronic parts, precision mechanical parts, etc.

[Conventional Technology] After washing lenses, liquid crystal display parts, electronic parts, precision mechanical parts, etc., they often cannot be used as products if water remains attached to them. Therefore, in the finishing process of such parts, water is usually removed using an organic solvent. Because of the various advantages listed below as an organic solvent, 1.
1,2-Trichloro-1,2,2-trifluoroethane (hereinafter referred to as R113) is widely used.

R113 is nonflammable, has low toxicity, and has excellent stability.

Moreover, adhering water can be removed without damaging base materials such as metals, plastics, and elastomers.

-i, many of the objects to be treated to remove attached water are composite parts made of metals, plastics, elastomers, etc. Therefore, R113 was advantageous from this point as well.

[Problems to be solved by the invention] Despite the fact that conventionally used R113 has various advantages, it has a long lifetime in the troposphere and diffuses into the stratosphere, where it is decomposed by sunlight and becomes chlorine. The use of R113 has been regulated because it generates radicals that cause a chain reaction with ozone and destroy the ozone layer.

Therefore, in order to solve these problems, the present invention provides R1
The object of the present invention is to provide a new solvent for removing adhered water that can remove water similar to No. 13.

[Means for Solving the Problems] The present invention has been made to achieve the above-mentioned objects, and
The present invention provides a solvent for removing adhered water containing an unsaturated chlorinated fluorinated hydrocarbon having 3 carbon atoms as an active ingredient.

The unsaturated chlorinated fluorinated hydrocarbons of the present invention include 1-chloro-2-fluoropropene (b, p, 59°C),
2゜3-dichloro-3,3-difluoropropene (b
, p, 57°C), 1,1-dichloro-3,3,3
-trifluoropropene (b.

p, 54°C), 1,2-dichloro-3,3,3-trifluoropropene (b, 9.53'C), 1,3-dichloro-1°3,3-trifluoropropene (b, p
, 57°C), 1,3-dichloro-2,3°3-trifluoropropene (b, p, 67°C), 3,3-dichloro-1,1,3-trifluoropropene (b, p
, 52°C), 3,3-dichloro-2,3-difluoropropene (b, p, 54°C), etc., or a mixture of two or more selected from hydrogen-containing unsaturated chlorinated fluorinated hydrocarbons is preferred. .

The solvent for removing adhered water of the present invention may contain various other components depending on various purposes. For example, in order to enhance the effect of removing adhered water, hydrocarbons, alcohols, ketones, or can contain at least one selected from organic solvents such as halogenated hydrocarbons and surfactants. The content of these organic solvents in the solvent for removing adhered water is 0 to 50% by weight, preferably 10 to 40% by weight, and more preferably 20 to 30% by weight.
When the mixture of the chlorinated fluorinated hydrocarbon and the organic solvent of the present invention has an azeotropic composition, it is particularly preferred to use the azeotropic composition.

The content ratio of surfactants in the solvent for removing adhered water is 0 to 0.
The hydrocarbons are 10% by weight, preferably 0.1 to 5% by weight, more preferably 0.2 to 2% by weight,
Straight chain or cyclic saturated or unsaturated hydrocarbons having 1 to 15 carbon atoms are preferred, such as n-pentane, isopentane, n-hexane, isohexane, neohexane, 2,3-dimethylbutane, 3-methylpentane, n -hebutane, isohebutane, 3-methylhexane, 2,4-dimethylbencune, n-octane, 2-methylhebutane, 3-methylhebutane, 4-methylhebutane, 2,2-dimethylhexane, 2,5-dimethylhexane, 3,3-dimethylhexane, 2-methyl-3-ethylpentane, 3-methyl-
3-ethylpentane, 2.3.3-trimethylpentane, 2.3.4-trimethylpentane, 2.2.3-
Trimethylpentane, isooctane, nonane, 2.2.
5- Trimethylbexane, decane, dodecane, 1-
Pentene, 2-pentene, 1-hexene, 1-octene, 1-nonene, 1-decene, cyclopentane, methylcyclopentane, cyclohexane, methylcyclohexane, ethylcyclohexane, bicyclohexane, cyclohexene, α-pinene, dipentene, decalin' , tetralin', amidino, amylnaphthalene, etc. I). More preferred are n-pentane, neohexane, 2,3-dimethylbutane, n-hexane, cyclopentane, cyclohexane, n-hebutane, and the like.

The alcohols are preferably chain or cyclic saturated or unsaturated alcohols having 1 to 17 carbon atoms, such as methanol, ethanol, low propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, and 5ec-butyl alcohol. , tert-butyl alcohol, pentyl alcohol, 5ee-amyl alcohol, 1-ethyl-1-propanol, 2-methyl-
1-butanol, isopentyl alcohol, tert-
Pentyl alcohol, 3-methyl-2-butanol, neopentyl alcohol, 1-hexanol, 2-methyl-1-pentanol, 4-methyl-2-pentanol,
2-ethyl-1-butanol, 1-heptatool, 2-
heptatool, 3-heptatool, 1-octatool,
2-octatool, 2-ethyl-1-hexanol, l
-nonanol, 3.5.5- trimethyl-1-hexanol, 1-decanol, 1-undecanol, 1-dodecanol, allyl alcohol, propargyl alcohol, benzyl alcohol, cyclohexanol, l-methylcyclohexanol, 2-methylcyclohexanol , 3-methylcyclohexanol, 4-methylcyclohexanol, α-terpineol, atonitinol,
It is selected from 2,6-dimethyl-4-heptatool, trimethylnonyl alcohol, tetradecyl alcohol, heptadecyl alcohol, and the like. More preferred are methanol, ethanol, isopropyl alcohol and the like.

1 to 9 saturated or unsaturated hydrocarbon groups> are preferably those represented by the general formula of acetone, methyl ethyl ketone, 2-pentanone, 3-pentanone, 2-hexanone, methyl butyl ketone, methyl isobutyl ketone,
2-heptanone, 4-heptanone, diisobutyl ketone, acetonylacetone, mesityl oxide, holon, methyl-n-amyl ketone, ethyl butyl ketone, methylhexyl ketone, cyclohexanone, methylcyclohexanone, isophorone, 2,4-pentanedione, di It is selected from acetone alcohol, acetophenone, fuenchen, etc. More preferred are acetone, methyl ethyl ketone and the like.

The halogenated hydrocarbons are preferably saturated or unsaturated halogenated hydrocarbons having 1 to 4 carbon atoms, such as dichloromethane, carbon tetrachloride, chloroform, 1.1-dichloroethane, 1.2-dichloroethane, 1. 1.1-) dichloroethane, 1.1.2-trichloroethane, 1.1.
l, 2-tetrachloroethane, 1.1.2.2-tetrachloroethane, pentachloroethane, 1.1-dichloroethylene, trans-1,2-dichloroethylene, c>s-1,2-dichloroethylene, trichlorethylene, tetrachloroethylene, 1 -chloropropane, 2
-Chloropropane, 1-bromopropane, 2-bromopropane, etc. More preferably dichloromethane, 1.1.1-trichloroethane, tra
These include ns-1,2-dichloroethylene, cis-1,2-dichloroethylene, trichlorethylene, tetrachlorethylene, 2-bromopropane, and the like.

The surfactant can be selected from various commonly used surfactants for removing adhered water, but preferably polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ester, polyoxyethylene alkyl ester, and polyoxyethylene alkyl ester are used. From oxyethylene polyoxypropylene alkyl ester, polyoxyethylene alkyl phenol, polyoxyethylene polyoxypropylene alkyl ester, polyoxyethylene sorbitan ester, polyoxyethylene polyoxybrobylene sorbitan ester, caprylic acid caprylic acid, polyoxyethylene alkyl amide, etc. It is chosen. More preferred are caprylamine caprylate, polyoxyethylene alkylamide, and the like.

As a method for removing adhered water using the solvent for removing adhered water of the present invention, a method using a spray or a shower, an immersion method using a cold bath, a hot bath, a steam bath or an ultrasonic bath, or an immersion method combining these baths, etc. are adopted. be able to.

[Example] Examples 1 to 13 A test for removing adhered water was conducted using the solvent for removing adhered water shown in Table 1 below.

After immersing a 30 mm x 18 III m x 5 mm thick glass plate in pure water, immersing it in a solvent for removing adhered water for 20 seconds to drain the water, and then immersing the removed glass plate in anhydrous methanol to remove the adhered water from the increased amount of water. We investigated the removal status. The results are shown in Table 1.

Table 1 [Effects of the Invention] The solvent for removing adhered water of the present invention has an excellent effect of removing adhered water, as is clear from the Examples.

Also, like the conventionally used R113, it has little effect on attacking metals, plastics, elastomers, etc.
Adhering water can be removed without adversely affecting composite parts made of these components.

Claims (1)

[Claims] 1. A solvent for removing adhered water containing an unsaturated chlorinated fluorinated hydrocarbon having 3 carbon atoms as an active ingredient. 2. The unsaturated chlorinated fluorinated hydrocarbon is 1-chloro-2-fluoropropene, 2,3-dichloro-3,3-difluoropropene, 1,1-dichloro-3,3,3-trifluoropropene, 1 , 2-dichloro-3,3,3-trifluoropropene, 1,3-dichloro-1,3,3-trifluoropropene, 1,3-dichloro-2,3,3-trifluoropropene, 3,3 -dichloro-1,1,3-
The solvent for removing adhered water according to claim 1, which is trifluoropropene or 3,3-dichloro-2,3-difluoropropene. 3. The adhesion according to claim 1, wherein the solvent for removing adhesion water contains at least one selected from hydrocarbons, alcohols, ketones, halogenated hydrocarbons, or surfactants. Solvent for water removal.